Actress Ashley Benson of hit TV show “Pretty Little Liars” and box office hit “Spring Breakers,” appeared at a Los Angeles 7-Eleven store to take the ceremonial first Slurpee sip of summer. 7-Eleven is kicking off the Slurpee season as the country heats up for summer this Memorial Day weekend. The convenience retailer is making summer #Awesummer with Summer Slurpee Days – a 49-cent medium-size Slurpee drink offer Friday through Monday, May 24-27, at participating 7-Eleven stores nationwide.